Metropolis has been taken over by Brainiac and most of the Justice League have been brainwashed. Only ones who weren’t are Wonder Woman, whose Amazonian ancestry saved her; and the Flash, who escaped from the Skull Ship in time.

As John Stewart was preparing to kill you, Flash sped through and punched John.

John Stewart: “Flash. Brainiac wondered how you got off the ship.”

“Speedster secret. The League doesn’t leave anyone behind.”